摘要
赤霉素(gibberellins或gibberellicacid,GA)作为植物生长的必需激素之一,调控植物生长发育的各个方面,如:种子萌发,下胚轴的伸长,叶片的生长和植物开花时间等。近年来随着植物功能基因组学的进一步发展,有关赤霉素生物合成及其调控,赤霉素信号转导途径,以及赤霉素与其他激素和环境因子的互作等领域的研究取得了较大的进展。本文综述了赤霉素生物合成的生物学途径及其调控研究;GA信号转导通道的研究进展,特别是DELLA蛋白阻遏植物生长发育的分子机理和GA解除阻遏作用(derepress)的分子模型;GA受体研究的新进展;探讨GA与其它激素之间的相互作用,以及植物在应答环境过程中的作用。
The phytohormone gibberellins （GA） play an important role in controlling and modulating diverse developmental processes, such as seed germination, hypocotyls elongation, leaf expansion and flowering time. In recent years, there are significant progresses in understanding of GA biosynthesis pathway and GA signaling in Arabidopsis and rice. This review highlights GA biosynthesis pathway and their regulation, including a new pathway identified in rice, and molecular model of ＂De-repress＂ in GA signaling. GA promotes plant growth via 26S proteasome-dependent proteolysis of DELLA proteins repressors, one of the key component in GA signaling, and also depends on GA-mediated interaction between GA receptor and DELLA proteins. Finally, this paper discussed the cross-talking between GA and other hormones, and modulation of adaptation to environments.
出处
《植物学通报》
CSCD
北大核心
2006年第5期499-510,共12页
Chinese Bulletin of Botany
基金
国家自然科学基金(No.30525003
30521001)
作者简介
Author for correspondence. E-mail：xdfu@genetics.ac.cn
